Adobe After Effects CS3 - Manual (Page 379)

AFTER EFFECTS CS3
User Guide
374
Amplitude Modulation The amount of amplitude modulation.
See also
“Preview video and audio” on page 120
Parametric EQ effect
The Parametric EQ effect emphasizes or attenuates specific frequency ranges. Parametric EQ is useful for enhancing
music, such as boosting low frequencies to bring up bass.
If you have audio with an unwanted sound (such as a beep from a forklift in the background), you can isolate and
cut the frequency range of the beep to attenuate the sound.
Using this effect, you can enhance up to three different bands of audio. As you adjust controls, a frequency-response
graph indicates the combined equalization curve you create; band 1 is red, band 2 is green, and band 3 is blue. You
may find it easier to specify controls if you determine in advance the frequency-response curve you want.
To identify the frequencies of unwanted sound, use the Audio Spectrum effect.
Band Enabled Activates an equalization band and its controls.
Frequency The center of the frequency band to modify.
Bandwidth The width of the frequency band to modify.
Boost/Cut The amount by which to boost (increase) or cut (decrease) the amplitude of the frequencies inside the
specified band. Positive values boost; negative values cut.
See also
“Audio Spectrum effect” on page 421
“Preview video and audio” on page 120
Reverb effect
The Reverb effect simulates a spacious or acoustically live interior by simulating random reflections of a sound off a
surface.
Reverb Time The average time, in milliseconds, between the original audio and the reverberated audio.
Diffusion Specifies how much the effect scatters the original audio. More diffusion can make the audio sound farther
from the microphone.
Decay Specifies the amount of time it takes for the effect to subside. A higher value simulates a larger space.
Brightness Specifies the amount of detail preserved from the original audio. High brightness simulates a room with
live (highly reflective) acoustics.
Dry Out, Wet Out The amounts of the original (dry) sound and delayed (wet) sound in the final output. Values of
50% are commonly used.
See also
“Preview video and audio” on page 120